Self cleaning disc filter apparatus

ABSTRACT

The present invention relates to a disc filter apparatus and in particular, to such a filtering apparatus that having a self-cleaning capabilities using an internal flow diverter to direct fluid flow through the filter apparatus to allow both filtering mode and self-cleaning mode.

FIELD OF THE INVENTION

The present invention relates to a disc filter apparatus and in particular, to such a filtering apparatus that having a self-cleaning capabilities.

BACKGROUND OF THE INVENTION

Ring disc filter elements are a popular item used in agricultural irrigation and in industrial applications for filtering a flowing fluid primarily water. Agricultural use of disc filtering apparatus are generally utilized to prevent entry or filter out impurities, brought by the water flow to watering installations such as sprinklers, micro-spray and drip lines, that have evolved in water conscience environments and for water conscience irrigation.

Ring discs are highly efficient in their ability to filter particles from fluids. The ring discs are diagonally grooved on both sides to a specific micron size. A series of the ring discs are stacked and compressed on a spine. The compressed discs are placed within a housing to form an efficient filtering element, such that when stacked the grooves on top of each disc runs opposite from the grooves below it, creating a filtration system having a series of grooves and traps for solids particles suspended within the water.

When the ring disc filter stack is filled with debris as a result of the filtering process, it necessitates cleaning and maintenance procedures of the filtering disc elements. Self-cleaning filters or counter-current flow filter cleaning operations are known, and are believed to reduces the frequency of required disassembly of the filter and ring discs, improving the operation of the filter system and reduces labor costs, and saves on water during the disc cleaning operations.

However such self-cleaning disc filtering systems are limited to large scale agricultural systems that require a number of filters interconnected and networked with one another to form a specialized piping to control the flow during the filtering and self-cleaning phases. Such systems further utilize numerous external controllers and electronic valves to control the flow through the filter apparatus so as to allow for and automate the self-cleaning procedure. Furthermore such self-cleaning disc filter systems require neighboring filtering apparatus to provide the source of fluid utilized during the self-cleaning process.

U.S. Pat. No. 7,000,782 and U.S. Pat. No. 7,032,760 to Walton et al, teach an example of a manually controlled back washing filter apparatus that is limited to use with to a mesh filter.

SUMMARY OF THE INVENTION

The present invention overcomes the deficiencies of the background art by providing a standalone self-cleaning disc filter apparatus that utilizes a flow diverter internal to the filtering apparatus, such that the internal flow diverter provides the required second flow direction to allow for self-cleaning.

Embodiments of the present invention alleviate the need for neighboring filtering devices that function in a network utilizing a plurality of external valves to control the flow thorough filter systems.

Embodiments of the present invention save on water usage during the cleaning process. Embodiments of the present invention may be realized in a manual form of self-cleaning filter apparatus therein further contributing to saving water in manual filtering apparatus.

In embodiment, the filter apparatus according to the present invention utilizing an internal flow diverter may provide for self-cleaned by diverting a flowing fluid source through the apparatus filter housing. Optionally the flowing fluid source for cleaning may be diverted through the internal flow diverter according to the present invention in any flow direction through the apparatus housing, for example including forward flowing and/or back-flush flowing (reverse flow). Optionally the flowing fluid source for cleaning may for example include but is not limited to upstream unfiltered flowing fluid, upstream filtered flowing fluid, upstream in-line filtered flowing fluid, downstream filtered flowing fluid, an external contained—not in stream—fluid source, the like or any combination thereof.

Optionally cleaning the filtering element utilized with the apparatus and fluid diverter according to the present invention may be provided by a plurality of optional means for example including but not limited to fluid flushing, back-flushing, forward-flushing, fluid streaming, fluid jet streaming, brushing, suctioning, spinning, the like or any combination thereof.

In embodiments, the flow diverter internal to the filtering apparatus is controlled by a controller external to the filtering apparatus.

Optionally embodiments of the present invention may be realized in manual configuration or automated configuration, wherein said internal flow diverter is controlled manually, semi-automatically, automatically, hydraulically and/or electronically.

Embodiment of the present invention provide a disc filter apparatus having a filtering mode and a self-cleaning mode, the apparatus provided for filtering an un-filtered flowing fluid with a filtering element, optionally provided in the form of a plurality of stackable disc ring filters, utilizing a first flow direction; the apparatus configured to self-clean the filtering elements from filtered waste material and debris trapped thereon by utilizing a second flow direction, the apparatus encased within a housing configured to enable both first flow direction during filtering mode, and second flow direction during self-cleaning mode, the housing comprising:

a central spine assembly for holding the filtering elements both in a stacked configuration during filtration and an un-stacked configuration during self-cleaning; the spine assembly having a first end and a second end; the spine assembly associated at a first end with a piston assembly having a compressed configuration during filtration, and an de-compressed configuration during self-cleaning; wherein the piston assembly's closed (compressed) configuration provides for maintaining the filtering elements in a stacked formation along the length of the spine during filtration; and wherein the piston assembly's open (decompressed) configuration provides for un-stacking and/or opening the filtering elements and for the flushing of filtered waste materials to exit the housing during self-cleaning; wherein the piston assembly configuration may be actuated by the second flow direction;

the spine assembly associated at a second end with a fluid diverter in the form of a valve body characterized in that the fluid diverter is disposed internally within the housing and controlled externally to the housing; the fluid diverter having two states for actuating between filtering mode utilizing a first flow direction, and a self-cleaning mode utilizing a second flow direction.

Optionally the housing comprises at least three openings to allow the first flow direction during filtering mode, and the second flow direction during self-cleaning mode, the openings including a flush exit, an inlet opening, and an outlet, wherein the flow through the housing is controlled by the position of the fluid diverter.

Most preferably the first flow direction during filtering may be provided by flowing, under upstream fluid pressure, an un-filtered flowing fluid from the inlet opening into a peripheral lumen within housing and across the filter elements, that are optionally stacked, from the external diameter to its internal diameter, producing a filtered flowing fluid within an inner lumen defined by spine assembly. The filtered fluid flowing up through a first open aperture in the fluid diverter and out to the outlet opening.

Most preferably the second flow direction, during self-cleaning, is provided by flowing, under pressure, upstream un-filtered, upstream filtered or in-line filtered upstream, flowing fluid from the inlet opening through the fluid diverter via a second open aperture to a peripheral channel that is in fluid communication with a plurality of spine legs spanning the length of the central spine assembly. Preferably the spine legs comprise a plurality of exit orifices that direct and jet the upstream flowing fluid toward filtering element producing a cleaning effect that allows debris and filtered waste material to be flushed through the flush exit opening. Preferably the exit orifices that direct and jet the upstream flowing fluid further provide for cleaning the disc filtering elements directly and rotating the discs to create a centrifugal force that spins the discs to improve cleaning.

Optionally, the fluid diverter has a substantially cylindrical body including an upper face, a lower face and perimeter surface, the cylindrical body having a substantially open central lumen:

Optionally the diverter upper face may be adapted to be securely associated within the housing about an upper portion thereof; the upper surface may be provided to associate with a fluid diverter controller disposed external to the housing.

Optionally the diverter lower surface adapted to receive and be in fluid communication with the spine assembly about the spine assembly's second end.

Preferably the lower surface has a central opening that may be in fluid communication with the open central lumen. Preferably the central opening is surrounded by a peripheral channel disposed about the perimeter of the lower surface. Optionally and preferably the peripheral channel configured to received and securely couple with the spine assembly at the spine assembly's second end.

Most preferably the central opening is configured to be in fluid communication and continuous with a spine assembly inner lumen. Most preferably the peripheral channel is configured to be in fluid communication with a plurality of spine legs defining the spine assembly inner lumen.

Most preferably the diverter perimeter surface has a flow inlet portion defined along the surface, and at least three apertures extending from the perimeter surface including two open apertures and one closed aperture.

Optionally, the flow inlet portion may be configured to be opposite the housing's inlet opening so as to allow the flow of the upstream un-filtered or filtered or in-line filtered flowing fluid into the housing within the peripheral lumen, most preferably providing for the first flow direction during filtering.

Optionally the first open aperture may be configured to align with and provide fluid communication between the outlet opening and the central opening defined about the diverter lower surface through the open central lumen, most preferably providing for the first flow direction during filtering.

Optionally the second open aperture may be configured to align with and provide fluid communication between the housing's inlet opening and the spine legs via the peripheral channel disposed along the diverter lower surface, therein providing for the second flow direction during self-cleaning.

Optionally the closed aperture may be configured to align with the outlet opening, the closed aperture provided to seal the outlet opening therein preventing loss of filtered down-stream flowing fluid from flowing into the housing during the second flow direction during self-cleaning.

Optionally the fluid diverter's two open apertures are adjacent to one another.

Optionally the fluid diverter's two open apertures are about 90 degrees apart.

Optionally the fluid diverter's second open aperture and the closed aperture are about 180 degrees apart.

Optionally the fluid diverter's first open aperture and the closed aperture are about 90 degrees apart.

Optionally the size of the open apertures may be adjustable.

Optionally the second open aperture may be semi-blocked or partially opened.

Optionally the size of the second opening may be adjustable according to the pressure required to clean the filtering elements.

Optionally the size of the second opening may be adjustable according to measured flow across the filtering element.

Optionally the size of the second opening may be manually adjustable manually or automatically adjustable.

Optionally the flow inlet portion may be configured to span across about one half of the external surface of the diverter perimeter surface.

Optionally the flow inlet portion may be configured to span across about a 180 degrees arc of the diverter perimeter surface.

Optionally the flow inlet portion may be disposed substantially opposite the first open aperture.

Optionally, the flow inlet portion may be aligned with the inlet opening and the first open aperture may be aligned with the outlet opening during the first flow direction for filtering the un-filtered flowing fluid.

Optionally the fluid diverter's closed aperture may be aligned with the outlet opening and the second open aperture may be aligned with the inlet opening during the second flow direction during self-cleaning procedure.

Optionally the fluid diverter's upper surface may be securely fastened with the upper portion housing utilizing threading.

Optionally the housing may further comprise a fourth opening adapted to couple with to a fluid diverter handle to manually control the position of the fluid diverter within the housing.

Optionally the housing may comprise an upper portion housing and a lower portion housing that couple with one another.

Optionally the fluid diverter may be controlled manually with a handle.

Optionally the fluid diverter may be controlled electronically or hydraulically.

Optionally the fluid diverter may be fit with an in-line filter mesh and/or screen to provide for in-line filtering of the upstream flowing during the self-cleaning mode.

Optionally the fluid diverter may be associated with the spine assembly at the spine second end, wherein the spine second end may be securely associated within a channel recess about the lower surface of the fluid diverter.

Optionally the spray nozzles orifices disposed along the length of the spine legs may be oriented inwardly of the filter elements for directing fluid outwardly across the filter elements to flush the filtering elements from its inner diameter edge toward the outer diameter edge.

Optionally the lower portion housing comprises a plurality of coupling members disposed along the internal surface of the lower portion housing, provided for supporting and holding the piston assembly within the lower portion housing.

Optionally the coupling members are elongated projections having a length proportional to the movement of a compression spring and compression plate disposed within the piston assembly.

Optionally the coupling members are provided in the form of a male coupling members and wherein the piston assembly comprises a corresponding female coupling member along the compression plate.

Optionally the apparatus filtering apparatus may further comprise at least one sensor in the form of a pressure sensor or flow sensor.

Optionally the apparatus filtering apparatus may further comprise a visual indicator indicative of time to switch from the filtering mode to the self-cleaning mode.

Optionally the flush exit may be controlled with a dedicated flush valve. Optionally flush valve may be is internal the filter apparatus housing to and/or incorporated within the filter apparatus housing. Optionally flush valve may be controlled by the position of the fluid diverter. Optionally the flush valve and fluid diverted may be controlled concertedly.

Optionally flush valve may be external to filter apparatus housing and controlled externally by means for example including but not limited to manually, remotely, electronically, hydraulically, automatically, flow sensors, pressure sensors, the like or any combination thereof.

Optionally the flush valve and fluid diverted may be controlled concertedly by the same external means.

Optionally the filtering apparatus according to embodiments of the present invention may be used as a stand-alone filtering device. Optionally the filtering apparatus according to embodiments of the present invention may be used in a filtering network comprising a plurality of filtering apparatus that are interconnected with one another and/or networked together to form a battery of filters.

In embodiments, the present invention provides a disc filter apparatus for filtering a flowing fluid, comprising: a housing having an open lumen and comprising an upper portion and a lower portion securely coupled with one another; wherein the housing having at least three openings to allow the flowing fluid to controllably flow through the housing providing at least two directions of flow, a first direction of flow for filtering and a second direction of flow for self-cleaning; the three openings including an inlet opening, outlet opening and a flush exit opening; and wherein the at least two direction of flow are controllable with a flow diverter disposed within the upper portion housing;

wherein within the open lumen, the housing includes a plurality of disc filter elements that are centrally stacked and held on a spine, wherein the spine and stacked filter elements defines two concentric lumen within the housing open lumen including an outer peripheral lumen defined between the internal surface of the housing and the external edge of the stacked filter elements; and an internal lumen defined by the inner surface of the spine and the stacked filter elements; wherein the peripheral lumen may be provided for receiving unfiltered upstream flowing fluid and the internal lumen may be provided for receiving filtered flowing fluid; such that during the first direction of flow, the flowing fluid flows across the stack of filter elements from the peripheral lumen toward the internal lumen; the spine assembly having a plurality of spine legs internally of the stack of the disc filter elements, wherein the plurality of spine legs are provided in the form of a hollow elongated tube having a plurality of spray nozzle orifices along its length, and wherein the spine legs span along the length of the spine between a spine second end and a spine first end; wherein the spine first end may be associated within the housing lower portion and the spine second end may be associated within the housing upper portion; the spine assembly first end may be associated with a piston assembly that may be disposed within the lower portion housing; the piston assembly comprising a compression spring and compression plate that may be fluidly associated with the base end of the spine assembly, the compression spring having sufficient tension to compress the compression plate and against the stacked filter elements along the length of the spine assembly, from the spine first end toward the spine second end, therein maintaining the stacked filter element configuration during the first direction of flow; the piston assembly configured for releasing the stacked filter elements along the length of the spine assembly during the second direction of flow; wherein, in response to a flowing fluid pressure produced within the spine legs, retracting the compression plate against the compression spring to counter the tension to release and relieve pressure on the stacked filter elements; therein opening the spaces between the filter elements to facilitate cleaning the filter elements during the second direction of flow, allowing for the flushing of filtered waste materials to exit the housing; wherein the fluid diverter directs fluid flow through the housing lumen across the at least three openings in producing the first direction of flow for filtering and the second direction of flow for self-cleaning; the fluid diverter characterized in that the fluid diverter may be disposed internally within the upper portion housing provided in the form of valve body in fluid communication with, and controlling the flow through, the inlet opening, the outlet opening, and the flush exit opening via the spine legs at the spine second end; wherein the fluid diverter may be controlled externally to the housing; the diverter having a substantially cylindrical body including an upper face, a lower face and perimeter surface, the cylindrical body having a substantially open lumen; the diverter upper face may be adapted to securely associated with the upper portion housing; provided to associate with a fluid diverter controller disposed external to the housing; the diverter lower surface adapted to receive and securely fit with the spine second end portion; the lower surface having a central opening that may be surrounded by a peripheral channel disposed about the perimeter of the lower surface; the channel configured to received and securely couple with the spine second end portion wherein the central opening may be configured to be in fluid communication with the internal lumen defined by the spine; and wherein the peripheral channel may be configured to be in fluid communication with the plurality of spine legs; the diverter perimeter surface having at least two open apertures extending from the perimeter surface; a first open aperture configured to align with and provide fluid communication between the outlet opening and the central opening defined about the diverter lower surface; therein providing a portion of the first flow path allowing filtered clean-fluid to flow from the internal lumen to the outlet opening; a second open aperture configured to align with and provide fluid communication between the inlet opening and the spine legs via the peripheral channel disposed along the diverter lower surface, therein providing the second flow path for second flow direction self-cleaning where second flow direction may be utilized to clean the stacked filter elements; wherein un-filtered upstream flowing fluid from the inlet opening flows through the second open aperture toward the peripheral channel and onto the spine legs; the diverter perimeter face having at least one closed aperture extending from the perimeter surface, configured to align with the outlet opening, the closed aperture provided to seal the outlet opening therein prevent loss of filtered downstream flowing fluid from flowing into the housing during the second flow path therein allowing for second flow direction self-cleaning where second flow direction may be utilized to clean the stacked filter elements; and the diverter perimeter surface having a flow inlet portion defined along its external surface configured to be opposite the inlet opening so as to allow free flow of the un-filtered flowing fluid into the housing during the first direction of flow, wherein the un-filtered flowing fluid flows into the peripheral lumen to be filtered across the stacked filter elements.

Within the context of this application the term flowing fluid refers to any flowing fluid in the form of a liquid, gas, plasma or the like that may be filtered from waste or impurities. Although reference to a flowing fluid made within the context of this application generally refers to water in filtered or unfiltered forms utilized in irrigation and/or an agricultural setting, however, the present invention for a filtering apparatus is not limited to such agricultural and/or irrigation uses and maybe used in any application or environment where filtering a flowing fluid is required, for example including but not limited to home use, drinking water applications, water treatment, sewage treatment, effluent, industrial use, pool filters, or the like.

Within the context of this application the term upstream refers to an un-filtered source or location of a flowing fluid before filtration and use with of the apparatus subject of the present invention.

Within the context of this application the term downstream generally refers to a filtered source or location of a flowing fluid after filtration and use of the apparatus subject of the present invention.

Within the context of this application the term “orifice” may refer to any opening and/or pore configured to introduce a flowing fluid under pressure to produce a spray, stream or jetting effect, the shape of the of orifice may assume any profile such as circular, ovular, rectangular, slit, square, polygonal or the like.

Within the context of this application the term ring disc filters or disc filters may be used interchangeably to refer to an annular filtering element capable of filtering water or other such flowing fluids as its passes across them. The filtering occurs when water passes through slots in the discs or between them. The discs configuration and/or shape and/or its slits may be of any shape and may for example be rounded, rectangular triangular or in any other shape.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The materials, methods, and examples provided herein are illustrative only and not intended to be limiting.

Implementation of the method and system of the present invention involves performing or completing certain selected tasks or steps manually, automatically, or a combination thereof.

BRIEF DESCRIPTION OF THE DRAWINGS

The invention is herein described, by way of example only, with reference to the accompanying drawings. With specific reference now to the drawings in detail, it is stressed that the particulars shown are by way of example and for purposes of illustrative discussion of the preferred embodiments of the present invention only, and are presented in order to provide what is believed to be the most useful and readily understood description of the principles and conceptual aspects of the invention. In this regard, no attempt is made to show structural details of the invention in more detail than is necessary for a fundamental understanding of the invention, the description taken with the drawings making apparent to those skilled in the art how the several forms of the invention may be embodied in practice.

In the drawings:

FIG. 1A is a schematic block diagram of an exemplary self-cleaning filtering apparatus according to optional embodiments of the present invention;

FIG. 1B is a schematic block diagram of an optional configuration of the filtering apparatus according to optional embodiments of the present invention;

FIG. 2A-D are schematic illustration of an exemplary self-cleaning apparatus according to optional embodiments of the present invention;

FIG. 3A-B are schematic illustration of the core filtering components of the self-cleaning apparatus according to optional embodiments of the present invention;

FIG. 4A-B are schematic illustration of the lower portion components forming the self-cleaning apparatus according to optional embodiments of the present invention;

FIG. 5A-B are schematic illustration of the upper portion components forming the self-cleaning apparatus according to optional embodiments of the present invention;

FIG. 6A-H are schematic illustration and optional views of the internal flow diverter valve body of self-cleaning apparatus according to optional embodiments of the present invention;

FIG. 7 is a schematic illustration of an optional housing of an exemplary self-cleaning apparatus according to optional embodiments of the present invention;

FIG. 8A-C are schematic illustration and optional views of the internal flow diverter valve body of self-cleaning apparatus according to optional embodiments of the present invention;

FIG. 9A-C are schematic illustration and optional views of an optional core filtering components including an optional spine assembly of the self-cleaning apparatus according to optional embodiments of the present invention;

FIG. 10 is a schematic illustration of an optional compression adaptor forming a part of the piston assembly of the self-cleaning apparatus according to optional embodiments of the present invention; and

FIG. 11A-D are schematic illustration of optional lower portion components forming the self-cleaning apparatus according to optional embodiments of the present invention.

DESCRIPTION OF THE PREFERRED EMBODIMENTS

The principles and operation of the present invention may be better understood with reference to the drawings and the accompanying description.

The following figure reference labels are used throughout the description to refer to similarly functioning components are used throughout the specification hereinbelow.

-   -   10 Filter Housing;     -   10 a dedicated opening;     -   10L peripheral lumen;     -   12 Upper Housing;     -   12 h handle opening;     -   12 i upstream Inlet opening;     -   12 o downstream outlet opening;     -   14 Lower housing;     -   14 c piston assembly coupling members;     -   14 f flush exit opening;     -   20 stacked disc filter elements;     -   22 in-line mesh filter ring     -   100, 102 filter apparatus;     -   110, 210 fluid diverter/valve body;     -   110L valve body open lumen;     -   110 u valve body upper face;     -   110 b valve body lower face;     -   110 o valve body lower central opening;     -   110 c peripheral channel;     -   110 p valve body perimeter surface;     -   110 t upper face threading;     -   112, 212 flow inlet portion/inlet aperture;     -   114, 214 first open aperture/outlet open aperture;     -   116, 216 second open aperture/spine aperture;     -   116 s, 216 s spine aperture sealed portion;     -   116 o, 216 o spine aperture open portion;     -   118, 218 closed aperture/outlet close aperture;     -   120, 220 filter spine assembly;     -   120 c, 220 c spine connecting channel;     -   120L spine lumen/inner lumen/internal lumen central;     -   122, 222 spine second end/spine top portion;     -   122 c spine leg connectors;     -   124,224 spine legs;     -   124 o,224 o spray orifice     -   126, 226 spine first end/spine base portion;     -   226 adaptor housing;     -   128 a, 228 a spine radial support members     -   128 b, 228 b spine longitudinal support members     -   130, 230 Piston assembly;     -   132, 232 compression plate;     -   232 a compression plated adaptor housing;     -   232 t threading     -   134, 234 compression spring;     -   236 piston compression adaptor;     -   236 a head portion     -   236 b tail portion;     -   140 flush valve;     -   150 valve controller/regulator/switch;     -   152 flow/pressure sensor;     -   155 automated controller;

Referring now to the drawings, FIGS. 1A-B show schematic block diagrams of optional configuration of a self-cleaning filter apparatus 100 according to embodiments of the present invention. FIG. 1A shows apparatus 100 where a flush valve 140 is incorporated within housing 10 such that the flush valve 140 may be controlled internally with apparatus 100.

FIG. 1B shows an optional configuration of apparatus 100 depicted in FIG. 1A in the form of apparatus 102 wherein that flush valve 140 is external to housing 10 and may be controlled externally, manually, remotely, electronically, hydraulically and/or automatically.

Filter apparatus 100,102 are configured to receive an upstream flowing fluid within a housing 10 that is equipped with filtering element(s) 20, for filtering the flowing fluid as it flows across filtering element(s) 20. Filter apparatus 100 is adapted to function in at least two modes a filtering mode and a self-cleaning mode.

Optionally the filtering apparatus 100,102 may be used as a stand-alone filtering device. Optionally filtering apparatus 100,102 may also be used in a filtering network and/or battery comprising a plurality of filtering apparatus 100,102 that are interconnected with one another and/or networked together to form a battery of filters.

The filtering mode utilizes a first direction of flow through apparatus 100, shown by the black arrows, and the self-cleaning mode utilizes a second direction of flow through apparatus 100 to clean filtering element(s) 20 from accumulated debris, shown by the white arrows.

Filter apparatus 100 comprises a housing 10 having an open lumen that includes filtering elements 20 disposed on a spine assembly 120, filtering element 20 is provided in the form of a plurality of ring disc filters that are disposed along the length of spine assembly 120, in a compressed stacked formation. Embodiments of the present invention provide for stacking (compress) and de-stacking (decompressing) the plurality of ring disc filters 20 along the length of spine assembly 120.

The filtering elements 20 and spine assembly 120 are preferably centered within the lumen of housing 10, and configured to maximize the filtering volume available within the internal cavity of housing 10. Optionally and preferably spine assembly and filtering elements 20 compartmentalize housing 10 into two concentric lumen, an external lumen 10L and an internal lumen 120L. Most preferably external lumen 10L provides for receiving the un-filtered flowing fluid while internal lumen 120L provides for receiving the filtered flowing fluid.

Housing 10 comprises two portions, an upper housing portion 12 and a lower housing portion 14 that may be coupled and securely sealed with one another to form housing 10. Housing upper housing portions 12 and lower housing portions 14 may be coupled with one another by optional coupling means as is known in the art for example including over an external clamping ring, matching threading, nuts and bolts, snaps, male-female connection members, any combination thereof or the like.

Spine assembly 120 and filtering elements 20 may span both upper housing portion 12 and lower housing portion 14. Preferably the length of spine assembly 120 is maximized to fit within the internal cavity formed within housing 10.

Housing 10 comprises at least three openings provided to allow both first flow direction during filtering, and the second flow direction, during self-cleaning. Optionally the at least three openings may be dispersed on housing 10 in any combination or manner on upper portion housing 12 and lower portion housing 14. Preferably the at least three openings include an inlet opening 12 i, an outlet opening 12 o and a flush exit opening 14 f.

Optionally housing 10 may be fit with a fourth opening for associating a valve controller 150 with housing 10, optionally and preferably about upper housing portion 12. Most preferably valve controller 150 is disposed externally to housing 10 and provided to control the position of a fluid diverter 110 disposed internally to housing 10. Optionally valve controller 150 may be controlled with a rotational motions providing for manually turning controller 150 to change between the different position of diverter 110, therein changing between the direction of fluid flow.

Optionally valve controller 150 may be controlled with a linear manual manipulation wherein controller 150 is provided in the form of a lever that may be raised up and down so as to switch the direction of fluid flow through housing 10 and preferably through diverter 110.

An example of a valve controller 150 in the form of a lever 150L is shown in FIG. 3C. Optionally linearly manipulating lever 150L, to cause fluid diverter 110 to move up and down, allows the diversion of the flowing fluid through diverter 110 to flow from the inlet aperture (112 not shown) to aperture 116 (spine aperture) so as to diver flow into channel 110 c while simultaneously releasing and/or unstacking the disc filtering elements (not shown in this view) disposed along the spine 120. Preferably the reverse motion of lever 150L allows for stacking the disc filtering elements 20 along spine 120 while allowing upstream flowing fluid to be diverted via diverter 110 into housing 10 for filtering across the stacked disc filters.

Accordingly FIG. 3C shows an optional depiction of a controller 150 in the form of a lever 150L that may be utilized to simultaneously control the flow of upstream flowing fluid through diverter 110 and to stack (compress) or unstack (release) the disc filters along spine 120. Optionally lever 150L may further simultaneously provide for opening or closing flush opening 14 f during self-cleaning or filtering modes respectively.

Optionally valve controller 150 may be controlled by automatic means for example by way of a mechanical valve, electronic valve, hydraulic valve or the like.

Optionally housing 10 may be provided with optional dedicated openings, for example for associating housing 10 with an external fluid source, for introducing an external fluid source into housing 10. Optionally such an external fluid source may be a container comprising at least one or more of an agent, a flowing fluid, an additive, a cleaning agent, a filtering additive, a cleaning fluid, a detergent, the like or any combination thereof.

Optionally housing 10 may be provided with a further optional dedicated opening for example openings 10 a, 12 h. Optionally opening 10 a may be placed about upper portion 12 or lower portion 14.

Optional dedicated opening 10 a, for example as shown in FIG. 7, preferably provides placement and replacement of an integrated in-line circular mesh filter ring 22. Circular mesh filter ring 22 may optionally be associated over aperture 116 on fluid diverter 110 to provide coarse filtering of upstream flowing fluid utilized during the second flow direction during self-cleaning. Preferably opening 10 a is utilized to gain access to and/or to replace and/or maintenance of the in-line filter ring 22, for example as shown in FIG. 8C. Preferably opening 10 a is capped and/or sealed during filter use and may only be uncapped and/or unsealed for maintenance purposes of ring 22 when not in use.

Optional dedicated opening 12 h may be utilized for associating with and/or incorporating a secondary handle or manual manipulator for controlling a portion of and/or an internal member of apparatus 100. For example, such a dedicated optional opening may be utilized for incorporating a spinning handle provided for manually spinning at least one of or both spine assembly 120 and/or filtering element 20.

Preferably first flow direction provides for filtering by allowing an upstream flow of an un-filtered flowing fluid to flow from an upstream source into housing 10 through inlet opening 12 i and allowing the filtered flowing fluid to exit housing 10 through outlet opening 12 o.

During first flow direction and filtering, an upstream flow of an un-filtered flowing fluid is received into housing 10 through inlet 12 i, flowing into peripheral lumen 10L. Due to buildup of fluid pressure within housing 10, the un-filtered flowing fluid is thereafter forced to flow from peripheral lumen 10L across filtering element 20 associated with spine assembly 120, into inner lumen 120L, therein filtering the flowing fluid. Preferably in the process debris and waste is trapped along filtering element 20 allowing the now filtered fluid to pass into inner lumen 120L.

During self-cleaning, second flow direction is provided by allowing a flowing fluid, preferably from an upstream source and optionally from an external fluid source, to flow into housing 10 through inlet 12 i is channeled into spine assembly 120, in particular spine legs 124, and out of housing 10 through flush exit opening 14 f, allowing debris and filtered waste material to be flushed from the filtering element 20. Most preferably spine legs 124 are provided in the form of a hollow elongated tube having a plurality of spray nozzle orifices 124 o along its length, therein allowing a flowing fluid to flow therethrough.

In order to facilitate both direction of flow filtering apparatus 100 comprises a fluid diverter 110 disposed internally within housing 10, most preferably within upper portion housing 12. Fluid diverter 110 is provided in the form of a valve body. Optionally fluid diverter 110 may be provided in the form of a two way valve body. More preferably fluid diverter 110 is provided in the form of a three-way valve body. Optionally fluid diverter 110 may be provided in the form of a four-way valve body. Optionally fluid diverter 110 may be provided in the form of a multi-way valve body having at least two ways about the valve body, and most preferably at least three or more ways available ways in the valve body.

Most preferably fluid diverter 110 provides for diverting the direction of flow between first flow direction and second flow direction. Therein diverter 110 provides for switching and determining the direction of flow within filter apparatus 100.

Optionally fluid diverter 110 may be fit with an in-line filter mesh ring 22 and/or screen, for example as shown in FIG. 8C, to provide for in-line filtering of the upstream fluid used during the self-cleaning mode. Optionally in-line filter mesh may be securely associated and/or coupled over the fluid diverter aperture and/or opening utilized during self-cleaning mode with the second flow direction. Optionally in-line filter mesh may be associated with fluid diverter 110 at any point along the path of the second flow direction utilized during self-cleaning mode.

Fluid diverter 110 is associated with and/or in fluid communication with outlet 12 o, inlet 12 i and spine assembly 120 particularly spine legs 124. Optionally and preferably fluid diverter 110 may be indirectly associated with and in fluid communication with flush exit opening 14 f, most preferably via spine assembly 120 in particular via spine legs 124.

Flush exit opening 14 f is most preferably disposed about lower portion housing 14. Preferably flush exit opening 14 f is controlled with a flush valve 140. Optionally flush valve 140 may be provided as a valve integrated within housing 10 and optionally and preferably associated either directly or indirectly with fluid diverter 110, for example as shown in FIG. 1A.

Optionally flush valve 140 may be provided as a valve external to housing 10, for example as shown in FIG. 1B. Optionally an external flush valve 140 may be a manually operated valve or a remotely controllable valve for example including but not limited to a hydraulic valve, electronic valve, automatic valve, piezoelectric valve, flapper valve or the like as is known in the art. Optionally a remotely controllable flush valve 140 may be controlled by a controller 155.

Optionally and more preferably flush valve 140 may be opened seamlessly when apparatus 100 is in self-cleaning mode during the second flow direction, and seamlessly closed when assuming filtering mode utilizing the first flow direction, as depicted by the position of fluid diverter 110.

Optionally flush valve 140 may be associated with, directly or indirectly, and/or integrated with, fluid diverter 110 and its external controller 150 for example, via spine assembly 120. For example, manipulations of controller 150 may simultaneously bring about re-positioning of fluid diverter 110 within housing 10 and a movement, for example a rotation, of at least one spine assembly member, for example spine base 126, that is in turn directly associated with flush valve 140 causing flush opening 14 f to change position from one position to another, open to close or close to open.

Optionally flush valve 140 may change position from one position to another, open to close or close to open, by associating with piston assembly 130 that may be associated with spine assembly 120. Optionally the status of the piston assembly 130 may be utilized to control flush exit opening 14 f by association with flush valve 140. Optionally when piston assembly 130 is in compressed mode, flush valve 140 and flush opening 14 f may assume the closed position, and while piston assembly 130 is in de-compressed mode flush valve 140 and flush opening 14 f may assume the open position.

Apparatus 100 preferably comprises a piston assembly 130 that may be controlled directly or indirectly by the positioning of fluid diverter 110. For example, piston assembly 130 may be controlled by the changing fluid pressure within housing 10 during first flow direction and second flow direction. More preferably piston assembly 130 is associated with spine assembly 120. Most preferably piston assembly 130 is controlled to be normally closed, compressed, during filtration and open (de-compressed, released) during cleaning. Most preferably assembly 130 is decompressed when fluid is directed into spine assembly 120 about spine legs 124, indicative of self-cleaning flow direction through orifice 124 o.

Optionally and more preferably piston assembly 130 comprises a compression plate 132 and compression spring 134, that function to maintain filtering element 20, provided in the form of a plurality of stacked ring disc filters, in compressed and/or stacked configuration along spine assembly 120, during filtering mode. Piston assembly 130 further provides for releasing the stacked configuration of disc ring filter elements 20, during cleaning mode, allowing the disc elements to separate and spin freely to enable flushing and cleaning of waste material filtered thereon.

FIG. 1A-B show optional configurations of apparatus 100 utilizing a dashed lead-line for example to show that optional sensors and/or controllers may be fit and/or associated with apparatus 100. Apparatus 100 may be utilized without any such sensors and/or controllers depicted by the dashed lead-lines.

Optionally apparatus 100 may be fit with and/or associated with at least one or more sensors for example including but not limited to flow meter and/or pressure sensors or the like. Optionally housing 10 may be fit with and/or associated with at least one or more sensors 152 for example in the form of a pressure sensor, flow-meter, or the like sensor provided to gauge at least one or more of pressure, flow, fluid pressure within housing 10. Optionally housing 10 may be associated with at least two or more sensors 152 dispersed about housing 10. Optionally a first sensor for example in the form of a flow meter 152 and/or pressure sensor may be associated with inlet 12 i and a second flow meter and/or pressure sensor 152 may be associated with outlet 12 o.

Optionally filtering apparatus 100 may be associated with a controller and/or microprocessor 155 or the like electronic means and/or computerized means for remotely and/or wirelessly and/or electronically and/or automatically and/or hydraulically, therein controlling the state and position of valve body 110, via valve controller 150 disposed externally to housing 10. Optionally valve controller 150 may be provided in the form of a motor for example in the form of a servo motor, water motor, or the like valve actuation means as is known in the art for example including but not limited to hydraulic, piezoelectric or the like.

Optionally control of controller 155 may be facilitated by a computer, Personal Data Assistant (PDA), smartphone, mobile communication device, mobile processing device, server or the like utilizing optional communication means for example including but not limited to wired, wireless, cellular, optical, acoustic, ultrasound, radio frequency, contactless, near field (NFC), any combination thereof or the like.

The description below collectively refers to the embodiment depicted in FIGS. 2-6 showing various views of filtering apparatus 100 according to an optional embodiment of the present invention.

FIG. 2A-D provide various views of apparatus 100. FIG. 2A shows a perspective view of the assembled self-cleaning apparatus 100, providing an external view of two part housing 10, showing how upper housing portion 12 and lower housing portion 14 may be coupled and/or associated with one another.

FIG. 2A further shows housing 10 having an optional four opening configuration including the three standard opening inlet opening 12 i, outlet opening 12 o, flush exit opening 14 f and additional optional handle opening 12 h. Optionally and preferably handle opening 12 h is provided for allowing valve controller 150 external to housing 10 to communicate with and control the position of fluid diverter 110 disposed internally to housing 10.

FIG. 2A further shows an optional location on housing 10 and in particular upper portion 12 where a flow and/or pressure sensor may be optionally associated with apparatus 10 for example about inlet 12 i and outlet 12 o.

FIG. 2B-C provide see through views of apparatus 100 revealing the various members that may be included in apparatus 100, FIG. 2B shows a perspective view while FIG. 2C shows a side view. FIG. 2B-C shows apparatus 100 comprising, fluid diverter 110, spine assembly 120, piston assembly 130, flush valve 140, and fluid diverter controller 150.

As shown, piston assembly 130 is disposed within the lower housing portion 14, over flush exit opening 14 f and associated with lower housing 14 utilizing a plurality of piston assembly coupling member 14 c. Coupling members 14 c provided to center piston assembly within lower housing 14. Coupling members 14 c further provide piston assembly 130 with the appropriate vertical positioning so as to provide sufficient room for the vertical movement required by piston assembly 130 to compress and decompress a plurality of disc filter elements 20 (not shown here) that may be stacked along the length of spine assembly 120. Optionally and preferably coupling member 14 c further act as a guiding member and/or railing and/or stoppers and/or track to track and guide compression plate 132 during its vertical movement.

FIG. 2B-C further show the association and coupling between piston assembly 130 with spine assembly 120 along spine base portion 126 and with fluid diverter 110 at spine top portion 122.

Most preferably spine assembly is centered within the open lumen of housing 10, most preferably providing for compartmentalizing the open lumen of housing 10 into peripheral lumen 10L and internal lumen 120L. Most preferably this compartmentalization facilitates filtering a flowing fluid, as previously described.

FIG. 2D provides an exploded view of the view shown in FIG. 2A, of apparatus 100 clearly revealing the members associated with and forming filtering apparatus 100 as previously described. FIG. 2D provides a view of the different portion of spine assembly 120 comprising a base end 126 adapted for associating and coupling with piston assembly 130 and a top end 122 adapted for associating and coupling with fluid diverter 110. Spine assembly 120 further comprises a plurality of spine legs 124, radial support members 128 a, and longitudinal support members 128 b that are dispersed between top portion 122 and base portion 126. As shown most preferably spine legs 124 are preferably provided with cleaning spray orifices 124 o provided to eject a flowing fluid under pressure toward filtering element 20 so as to clean it. Most preferably during self-cleaning and when filtering element 20 is provided in the form of a plurality of ring disc filter elements, that are un-stacked along the length spine assembly 120, the flowing fluid ejected from the plurality of orifices 124 o disposed about the length of spine legs 124 causes the ring disc filter elements to spin, while cleaning the filtering elements outwardly toward the internal surface of housing 10.

FIG. 3A-B show schematic illustrations of the core filtering components as assembled within housing 10 of self-cleaning apparatus 100, housing 10 including upper housing 12 and lower housing 14 has been removed. FIG. 3A-B shows the core components including valve controller 150, fluid diverter 110, spine assembly 120, filtering element 20, piston assembly 130 and flush valve 140. FIG. 3A depicts the core components with filtering elements 20 while in FIG. 3B filtering element 20 has been removed to reveal spine assembly 120.

FIG. 4A shows a schematic cross section view of the lower portion assembled filtering apparatus 100 comprising lower housing 14, filtering element 20, spine assembly 120 and piston assembly 130. FIG. 4A provides a depiction of inner lumen 120L and peripheral lumen 10L formed across filtering elements and spine assembly 120 at the lower portion of apparatus 100 as defined by lower housing 14.

FIG. 4B provides a close up schematic illustration of piston assembly 130 showing compression plate 132 and compression spring that are utilized to compress and maintain filter element 20 provided in the form of a plurality of ring disc filtering elements in compressed forming a stacked configuration about spine assembly 120.

FIG. 5A shows a see-through view of a schematic illustrative depiction of the upper portion assembled filtering apparatus 100 comprising upper housing 12, fluid diverter 110, valve handle 150, and spine assembly 120 and filtering element 20. FIG. 5A provides a depiction of inner lumen 120L and peripheral lumen 10L formed across filtering elements and spine assembly 120 at the upper portion of apparatus 100 as defined by upper housing 10.

FIG. 5B provides a sectional view taken about the through fluid diverter 110 revealing the continuous inner lumen 120L formed from spine assembly 120 through to outlet 12 o. The continuous inner lumen 120L provides for continuous flow of filtered flowing fluid from inner lumen 120L up to the outlet opening 12 o and finally to the downstream target location.

FIG. 6A-H show various views of fluid diverter 110 according to a preferred embodiment of the present invention in the form of a three way valve body. The fluid diverter is characterized in that it is disposed internally within housing 10 within upper portion 12 and provides for control of the direction of fluid flow through filtering apparatus 100 in assuming a first flow direction during filtering and a second flow directing during self-cleaning. Fluid diverter 110 is configured to provide for self-cleaning from an upstream source utilizing the unfiltered fluid flow therein saving energy utilized in the filtering and cleaning process. Most preferably fluid diverter 110 is configured to maintain outlet 10 o in closed position throughout the self-cleaning process therein ensuring that filtered flowing fluid is not wasted during the self-cleaning process.

The fluid diverter configuration according to the present invention overcomes the deficiencies of prior art self-cleaning filtering apparatus in that it does not utilize the downstream filtered flowing fluid for the filter cleaning operation and therefore saves water consumption require during the self-cleaning operations. Self-cleaning filter apparatus according to the prior art utilize a plurality of flow control valves that are disposed externally to a filtering assembly in order to allow appropriate control of the fluid flow for self-cleaning function. Such prior art external valves are expensive both to run and maintain utilizing energy in their operation. Furthermore by way of utilizing filtered downstream flowing fluid for the self-cleaning procedure prior art self-cleaning filtering apparatus both waste the filtered flowing fluid cleaning utilizing back flushing and therein waste the energy invested in filtering the upstream flowing fluid.

Optionally the configuration of fluid diverter 110 and any portion thereof may be configured in relation to and/or according to optional parameters associated with the filtering process it is facilitation. Such optional parameters may for example include but is not limited to pressure, upstream flow rate, the type of flowing fluid being filtered, flowing fluid properties, viscosity of the flowing fluid, size of apparatus 100, size of housing 10, type of flush valve 140, timing of flush valve 140, timing of piston assembly 130, any combination thereof or the like.

FIG. 6A shows a perspective view of fluid diverter 110 coupled with a valve control handle 150, wherein fluid diverter 110 is disposed within housing 10 while handle 150 is disposed externally with housing 10 via an optional handle opening 12 h, as previously described. Most preferably handle 150 is provided for turning fluid diverter 110 to control the flow therethough.

As shown, optionally and preferably diverter 110 is a substantially cylindrical valve body having an upper face 110 u, a lower face 110 b and perimeter surface 110 s. Most preferably the cylindrical body has a substantially open central lumen 110L.

Diverter upper face 110 u may be adapted to securely associated within housing 10 at an upper portion thereof; for example about upper housing 12, for example with threading 110 t, shown in FIG. 6B. Most preferably upper surface 110 u is provided to optionally and preferably associate with a fluid diverter controller 150 disposed external to housing 10, for example as in the form of a handle as shown in FIG. 6A.

FIG. 6C-D, show diverter lower face 110 b adapted to receive and securely fit with spine assembly 120 at its base end 122. Lower face 110 b has a central opening 110 o that is in fluid communication with the open central lumen 110L. Central opening 110 o is preferably surrounded by a peripheral channel 110 c disposed along the perimeter of lower face 110 b. Peripheral channel 110 c is preferably configured to receive and securely couple with spine assembly 120 at second end 122. Optionally and preferably central opening 110 o is configured to be in fluid communication and continuous with inner lumen 120L. Peripheral channel 120 c is configured to be in fluid communication with a plurality of spine legs 124 defining the spine assembly inner lumen 120L, providing for introducing a flowing fluid into the spine legs 124 that may flow out of orifices 124 o.

FIG. 6E-6H show diverter perimeter surface 110 p comprising a flow inlet portion 112, defined along surface 110 p, and at least three apertures extending from the perimeter surface 110 p including two open apertures 116, 114 and one closed aperture 118.

Preferably flow inlet portion 112 is configured to be opposite inlet opening 12 i so as to allow the flow of an un-filtered flowing fluid into housing 10, preferably into peripheral lumen 10L, therein providing for the onset first flow direction during filtration. FIG. 6E shows a broken guiding line that outlines the area available to inlet portion 112 as upstream flowing fluid enters housing 10. The broken guiding line shows that a substantial portion of diverter 110 is allotted to inlet portion 112, for example up to about 50% of surface of perimeter surface 110 p is allotted for inlet portion 112.

Preferably, first open aperture 114 along surface 110 p is configured to align with and provide fluid communication between the outlet opening 12 o and the central opening 110 o defined on the diverter lower surface 110 b through the open central lumen 110L, therein providing for the end portion of first flow direction during the filtering process that allows a filtered flowing fluid to flow out of housing 10 via outlet 12 o. Aperture 114 is only open during the first flow direction during filtration and is sealed throughout the self-cleaning process.

Preferably, second open aperture 116 is configured to align with and provide fluid communication between the inlet opening 12 i and the spine legs 124 via peripheral channel 110 c disposed along diverter lower surface 110 b. Such configuration preferably provides for the onset of the second flow direction during self-cleaning, and allows for the decompression of piston assembly 130 and optionally for the opening of flush exit opening 14 f and flush valve 140.

Optionally flush exit opening 14 f and flush valve 140 may be opened and closed manually or automatically as previously described. Optionally moving diverter 110 to the self-cleaning mode by associating aperture 116 with inlet 12 i may also direct the mechanical movement or hydraulic opening of flush valve 140 and flush exit opening 14 f, as previously described.

Optionally flush valve 140 may be opened manually by a user to initiate the self-cleaning process after diverter 110 has been set to the self-cleaning mode by maneuvering aperture 116 over inlet 12 i.

Preferably when self-cleaning mode is initiated by maneuvering aperture 116 over inlet 12 i, it allows piston assembly 130 to decompress as pressure is built-up down through spine legs 124 pushing compression plate 132 down and decompressing spring 134.

As shown in FIG. 6F, aperture 116 is a partially open aperture having an open portion 116 o and a sealed portion 116 s. Open portion 116 o is in fluid communication with peripheral channel 110 c, therein configured to allow upstream flowing fluid to flow into channel 110 c and into the lumen of spine legs 124 and out orifice 124 o. Sealed portion 116 s is configured to quick stop the self-cleaning process ensuring sufficient recovery time when switching modes from self-cleaning mode back to filtering mode, allowing apparatus 110 to commence the filtering process only after flush opening 14 f and flush valve 140 are closed and after piston assembly 130 is re-compressed.

Optionally and preferably the relative dimension, size and shape of the open portion 116 o and sealed portion 116 s of aperture 116 may be configured in relation to and/or according to optional parameters associated with the filtering process. Such optional parameters may for example include but is not limited to pressure, upstream flow rate, the type of flowing fluid being filtered, flowing fluid properties, viscosity of the flowing fluid, size of apparatus 100, size of housing 10, type of flush valve 140, timing of flush valve 140, timing of piston assembly 130, any combination thereof or the like.

Optionally the relative size and/or area of open portion 116 o to sealed portion 116 s may be controlled remotely, for example with a controllable shutter disposed about sealed portion 116 s, that may optionally be controlled by and optional controller 155 optionally associated with apparatus 110, shown in FIG. 1A-B. Optionally a shutter disposed about sealed portion 116 s may be controlled manually for example with a control handle 150 or via an optional member associated with handle 150.

FIG. 6G-H show closed aperture 118 that is configured to align with outlet opening 12 o. Closed aperture 118 provides for sealing outlet opening 12 o therein preventing loss of and ensuring the quality of the down-stream filtered flowing fluid during the self-cleaning mode. Sealing outlet 12 o with aperture 118 therefore provides for redirecting the upstream flowing fluid from flowing into the housing; therein providing for the second flow direction during self-cleaning. As seen in FIG. 6G-H the size of both open aperture 114 and closed aperture 118 govern about a 25% of the size of diverter 110 where the majority of the sealed portion is associated with aperture 118 provided to ensure the quality of the down-stream filtered fluid.

FIG. 8A-B show an optional embodiment of the fluid diverter according to the present invention, showing various views of fluid diverter 210. Diverter 210 is similar to diverter 110 described and shown in FIG. 6A-H, diverter 210 is characterized in that aperture 216 is configured to have a concentric open portion 216 o and sealed portion 216 s. Open portion 216 o is in fluid communication with peripheral channel 210 c, therein configured to allow upstream flowing fluid to flow into channel 210 c and into the lumen of spine legs 124, 224 and out orifice 124 o, 224 o. Most preferably orifice 216 is configured to receive an annular mesh filter 22, show in FIG. 8C. Preferably mesh filter ring 22, is configured to securely associate with seal portion 216 s. Mesh filter ring 22 is provided to filter upstream flowing fluid flowing through the filter spine assembly 120,220 and in particular spine legs 124,224 during the self-clean mode. FIG. 8A shows a perspective view while FIG. 8B shows a sectional view to reveal the passageway from opening 216 o toward channel 210 c.

FIG. 9A-C show optional views of a spine assembly 220 according to an optional embodiment of the present invention. FIG. 9A shows a perspective view of spine assembly 220 that is similarly structured as spine assembly 120 as previously described. Spine assembly 220 having a plurality of spine legs 224 including a plurality of spray orifice 224 o provided to expel flowing fluid during the self-cleaning mode. Spine assembly 220 further comprises support members 228 a, 228 b similar to support members 128 a, 128 b as previously described. Optionally radial support members 228 a may be configured to act as turbine blades, for example as shown in top down view FIG. 9C, to facilitate rotation of spine assembly 220 and the disc filter medial 20 associated thereon.

Spine assembly 220 has a second end 222 and first end 226 similar to second end 122 and first end 126 of spine assembly 120 as previously described. Second end 222, shown in FIG. 9C is provided for coupling with optional fluid diverters 110, 210 and comprises a spine connecting channel 220 c to channel flowing fluid into spine legs 124, 224 from peripheral channel 110 c, 210 c.

Spine assembly first end 226, best shown in FIG. 9B, features an adaptor housing 226 p, provided for receiving at least a portion of adaptor 236, shown in FIG. 10. As previously described with respect to first end 126, first end 226 functions to couple and/or associated spine assembly 120,220 with piston assembly 130,230. Preferably adaptor housing 226 p provides for receiving and housing adaptor 236, an example of which is shown in FIG. 10, that facilitates coupling between spine assembly 120,220 and piston assembly 130,230.

Preferably adaptor 236 provides for harnessing the rotational motion of diverter 110,210 and spine assembly 120,220, provided with controller 150, to actuate the configuration of piston assembly 130,230. Therefore adaptor 236 allows piston assembly 130, 230 to stack (compress) or un-stack (release) disc filtering elements 20, during the filtering and self-cleaning modes respectively, based on the position fluid diverter 110,210 as depicted by controller 150.

FIG. 10 shows adaptor 236 having a bolt like body comprising a head portion 236 a and a tail portion 236 b. Head portion 236 a provides for associating with spine assembly 120,220 preferably along first end 126,226, for example within housing 226 p. Optionally head portion 236 a may comprise at least one or more coupling members 236 c, for securely associating adaptor 236 within housing 226 p.

Tail portion 236 b provides for associating with piston assembly 130, 230. Tail portion 236 b preferably features threading and/or groove 236 t provided for coupling with corresponding threading and/or rail guides 232 t, FIG. 11B, disposed with piston assembly 130, 230 to facilitate actuating the state and/or configuration of piston assembly 130, 230.

FIG. 11A-D, shows optional views of piston assembly 230, that functions similar to piston assembly 130, as previously described. Piston assembly 230,130 provide for controlling the compression state of disc filters 20 along spine assembly 120,220 while preferably controlling the flush opening 14 f so as to open flush opening during self-cleaning mode and closing it during filtration mode.

FIG. 11C-D show sectional views of piston assembly 230 as it is disposed within housing 10, about lower portion 14 over flush opening 14 f. FIG. 11C-D show piston assembly in the self-cleaning mode while flush opening 14 f is open.

FIG. 11A-B shows different view of piston assembly 230, that functions similarly to piston assembly 130 as previously described therein featuring a compression plate 232, 132 and spring 134,234. Optionally and preferably as previously described assembly 130,230 may be coupled with an internal flush valve 140, for example in the form of a plug as shown, to control the state (open/close) of opening 14 f.

Piston assembly 230 feature a compression plate adaptor housing 232 a for receiving at least a portion of adaptor 236, FIG. 10, as previously described. Preferably housing 232 a is configured to receive tail portion 236 b. Preferably housing 232 a comprises threading and/or rail track 232 t configured to correspond with rail and/or adaptor threading 236 t.

While the invention has been described with respect to a limited number of embodiment, it is to be realized that the optimum dimensional relationships for the parts of the invention, to include variations in size, materials, shape, form, function and manner of operation, assembly and use, are deemed readily apparent and obvious to one skilled in the art, and all equivalent relationships to those illustrated in the drawings and described in the specification are intended to be encompassed by the present invention.

Therefore, the foregoing is considered as illustrative only of the principles of the invention. Further, since numerous modifications and changes will readily occur to those skilled in the art, it is not described to limit the invention to the exact construction and operation shown and described and accordingly, all suitable modifications and equivalents may be resorted to, falling within the scope of the invention.

Having described a specific preferred embodiment of the invention with reference to the accompanying drawings, it will be appreciated that the present invention is not limited to that precise embodiment and that various changes and modifications can be effected therein by one of ordinary skill in the art without departing from the scope or spirit of the invention defined by the appended claims.

It is appreciated that certain features of the invention, which are, for clarity, described in the context of separate embodiments, may also be provided in combination in a single embodiment. Conversely, various features of the invention, which are, for brevity, described in the context of a single embodiment, may also be provided separately or in any suitable sub-combination or as suitable in any other described embodiment of the invention. Certain features described in the context of various embodiments are not to be considered essential features of those embodiments, unless the embodiment is inoperative without those elements.

While the invention has been described with respect to a limited number of embodiments, it will be appreciated that many variations, modifications and other applications of the invention may be made. 

1. A filtering apparatus (100) having a filtering mode and a self-cleaning mode, the apparatus provided for filtering an upstream flowing fluid with filtering elements (20) in the form of a plurality of stackable discs during filtering mode utilizing a first flow direction, apparatus (100) also configured to self-clean said filtering elements (20) with said upstream flowing fluid during self-cleaning mode utilizing a second flow direction, the apparatus (100) encased within a housing (10) including a fluid diverter (110,210) for controlling the flow through said housing, a central spine assembly (120,220) for housing said plurality of stackable discs, and a piston assembly (130,230) for controlling the configuration of said plurality of disc filters along said disc filer spine, a. said housing (10) having an upper housing portion (12) and a lower housing portion (14) that are coupled with one another; housing (10) further comprising at least three openings to allow said first flow direction during filtering mode, and said second flow direction during self-cleaning mode, said at least three openings including an inlet opening (12 i) for receiving upstream unfiltered fluid, an outlet (12 o) for receiving downstream filtered fluid and a flush exit (14 f) for removing filtered waste materials, wherein the flow through said housing (10) between said openings is controlled by the position of a fluid diverter (110) disposed within upper portion (12) of housing (10); b. said central spine assembly (120) for holding said plurality of filtering elements (20) both in a stacked configuration during filtration mode and an un-stacked configuration during self-cleaning mode; said spine assembly (120) having a first end (126) and a second end (122); c. said spine assembly (120) associated at a first end (126) with said piston assembly (130) having a closed configuration during filtration mode, and an open configuration during self-cleaning mode; wherein the closed configuration of said piston assembly (130) provides for maintaining said filtering elements (20) in a stacked formation along the length of said spine (120) during filtration; and wherein said piston assembly (130) open configuration provides for un-stacking said filtering elements (20) during self-cleaning mode to facilitate flushing waste materials through said flush exit (14 f); wherein said piston assembly (130) is actuated by the position of said fluid diverter; d. said spine assembly (120) associated at a second end 122 with said fluid diverter (110) in the form of a valve body said fluid diverter (110) is disposed internally within said housing (10), at upper portion (12), said fluid diverter (110) is controlled externally to said housing with a controller (150); said fluid diverter (110) having two states for actuating between filtering mode, utilizing said first flow direction, and self-cleaning mode, utilizing said second flow direction; the fluid diverter having a dedicated aperture (116) in fluid communication with a peripheral channel (110 c) utilized during self-cleaning mode, said dedicated aperture (116) is configured to receive upstream flowing fluid that is diverted to said peripheral channel (110 c) and into a plurality of spine legs (124) of said spine assembly (120,220) wherein said spine legs (124) have orifices (124 o) defined along its length, said orifices (124 o) are used to jet fluid so as to clean said plurality of disc filters.
 2. The apparatus of claim 1 wherein said piston assembly (130) comprises a compression plate (132) and spring (134) wherein said compression plate (132) is coupled with said spine assembly (120) at a first end (126) such that the an end of spine legs (124) is in fluid communication with said compression plate (132) configured such that fluid diverted into said spine legs (124) during self-cleaning mode compresses said compression plate (132) against spring (134) therein opening a flush valve (140) over flush opening (14 f).
 3. The apparatus of claim 1 wherein said piston assembly (130,230) is coupled with said fluid diverter (110,210) via spine assembly (120,220), a. wherein spine assembly is coupled with fluid diverter (110) at second end (122); and b. wherein said spine assembly is coupled with said piston assembly (130,230) at first end (126) via an adaptor (236), wherein adaptor (236) facilities changing the configuration of said piston assembly (130) simultaneously when changing the position of said fluid diverter (110) between self-cleaning mode and filtering mode.
 4. The apparatus of claim 3 wherein said adaptor (236) having a bolt like body comprising a head portion (236 a) and a tail portion (236 b), wherein said head portion (236 a) is configured to couple with the first end (126) of said spine assembly (120,220); wherein said tail portion (236 b) is configured to couple with the compression plate (232) of said piston assembly (230), said tail portion having threading (236 t) configured to associated with matching threading (232 t) disposed on a portion of compression plate (232) such that adaptor (236) provides for maneuvering piston assembly (230) linearly when said fluid diverter (110) is turned to either of self-cleaning mode or filtering mode.
 5. The apparatus (100) of claim 1 wherein said fluid diverter (110) provides for determining the direction of flow through housing (10): a. wherein said first flow direction during filtering is provided by flowing under upstream fluid pressure an un-filtered flowing fluid from said inlet opening (12 i) into a peripheral lumen (10L) within housing (10) and across said stacked filter elements (20) from the external diameter to its internal diameter, producing a filtered flowing fluid within an inner lumen (120L) defined by spine assembly (120), and up through a first open aperture (114) in said fluid diverter (110) and out to said outlet opening (12 o); and b. wherein said second flow direction during self-cleaning is provided by flowing under pressure upstream un-filtered flowing fluid from said inlet opening (12 i) through said fluid diverter (110) through a second open aperture (116) to a peripheral channel (110 c) that is in fluid communication with said spine assembly (120), said peripheral channel (110 c) diverting a flowing fluid said spine assembly (120) through to a plurality of spine legs (124) spanning the length of said central spine assembly (120), said spine legs (124) having a plurality of exit orifices (124 o) along its length that direct and jet said upstream flowing fluid toward filtering element (20) producing a cleaning effect allowing debris and filtered waste material to be flushed away from said filtering element (20) through said flush exit opening (14 f)
 6. The apparatus of claim 1 wherein said fluid diverter (110) has a substantially cylindrical body including an upper face (110 u), a lower face (110 b) and perimeter surface (110 p), said cylindrical body having a substantially open central lumen (110L), characterized in that: a. said diverter upper face (110 u) is adapted to be securely associated within said housing (10) about an upper portion (12) thereof; said upper surface (110 u) is provided to associate with a fluid diverter controller (150) disposed external to said housing; b. said diverter lower surface (110 b) adapted to receive and be in fluid communication with said spine assembly (120) about said second end (122); said lower surface (110 b) having a central opening (110 o) that is in fluid communication with said open central lumen (110L); said central opening (110 o) is surrounded by a peripheral channel (110 c) disposed about the perimeter of said lower surface (110 b); said peripheral channel (110 c) configured to received and securely couple with said spine assembly second end (122), wherein said central opening (110 o) is configured to be in fluid communication and continuous with a spine assembly inner lumen (120L); and wherein said peripheral channel (110 c) is configured to be in fluid communication with a plurality of spine legs (124) defining said spine assembly inner lumen (120L); c. said diverter perimeter surface (110 p) having a flow inlet portion (112) defined along said surface, and at least three apertures (114, 116, 118) extending from said perimeter surface 110 p including two open apertures (114, 116) and one closed aperture (118); i. said flow inlet portion (112) configured to be opposite said inlet opening (12 i) so as to allow the flow of said upstream un-filtered flowing fluid into said housing (10) within peripheral lumen (10L); therein providing for said first flow direction during filtering; ii. a first open aperture (114) is configured to align with and provide fluid communication between said outlet opening (12 o) and said central opening (110 o) defined about said diverter lower surface (110 b) through said open central lumen (110L), therein providing for said first flow direction during filtering; iii. a second open aperture (116) configured to align with and provide fluid communication between said inlet opening (12 i) and said spine legs (124) via said peripheral channel (110 c) disposed along said diverter lower surface (110 b), therein providing for said second flow direction during self-cleaning; iv. a closed aperture (118) configured to align with said outlet opening (12 o), said closed aperture provided to seal said outlet opening (12 o) therein preventing loss of filtered down-stream flowing fluid from flowing into said housing during said second flow direction during self-cleaning.
 7. The apparatus of claim 6 wherein said second open aperture (116,216) is selected from: a. an open aperture having an adjustable aperture size; b. an open aperture having a manually adjustable aperture size; c. an open aperture having an automatically adjustable aperture size; d. an open aperture that is semi-blocked (116 s); e. an open aperture that is partially opened (116 o); f. an open aperture having an adjustable aperture size according to the pressure required to clean said filtering elements (20); g. an open aperture having an adjustable aperture size according to the measured flow across said filtering element (20).
 8. (canceled)
 9. (canceled)
 10. (canceled)
 11. (canceled)
 12. The apparatus of claim 1 wherein at least a portion of said fluid diverter along the second flow path utilized during self-cleaning mode is associated with mesh filter therein providing in-line filtered upstream flowing fluid during self-cleaning mode; wherein said mesh filter is associated over said second aperture opening (116) or along said peripheral channel (110 c).
 13. (canceled)
 14. The apparatus of claim 1 wherein said second open aperture (116) is fit with a removable mesh filter ring (22) providing in-line filtered upstream flowing fluid during self-cleaning mode.
 15. The apparatus of claim 6 wherein said diverter upper surface (110 u) is securely fastened with said upper portion housing (12) utilizing threading (110 t).
 16. The apparatus of claim 1 wherein housing (10) further comprise an opening (12 h) adapted to couple with to a fluid diverter handle (150) to manually control the position of said fluid diverter (110) within said housing (10); wherein said fluid diverter (110) may be controlled manually with a handle or lever (150L).
 17. (canceled)
 18. The apparatus of claim 16 wherein said fluid diverter controller is provided in the form of a lever (150L) configured to change the direction of flow through said fluid diverter (110) between said first flow direction and said second flow direction while simultaneously determining the state of said plurality of disc filtering element (20) along said spine assembly (120) to stack said disc filtering elements (20) during said first flow direction and to unstack said disc filtering elements (20) during said second flow direction.
 19. The apparatus of claim 18 wherein said lever (150L) further simultaneously controls the state of flush opening (14 f) to be closed during said first flow direction and to be open during said second flow direction.
 20. The apparatus of claim 19 wherein said lever (150L) controls said flush opening (14 f) by controlling a flush valve (140).
 21. The apparatus of claim 1 wherein said fluid diverter (110) may be controlled electronically or hydraulically.
 22. (canceled)
 23. The apparatus of claim 1 wherein said lower portion housing (14) comprises a piston assembly seat in the form of a plurality of coupling members (14 c) disposed along the internal surface of said lower portion housing (14) provided for supporting and holding said piston assembly (130) within said lower portion housing (14).
 24. The apparatus of claim 23 wherein said coupling members (14 c) are elongated projections having a length proportional to the movement of a compression spring (134) and compression plate (132) disposed within said piston assembly (130).
 25. The apparatus of claim 23 wherein said coupling members (14 c) are provided in the form of a male coupling members and wherein said piston assembly (130) comprises a corresponding female coupling member along said compression plate (132).
 26. The apparatus of claim 1 further comprising at least one sensor (152) in the form of a pressure sensor or flow sensor.
 27. The apparatus of claim 1 further comprising a visual indicator indicative of time to switch from said filtering mode to said self-cleaning mode.
 28. The apparatus of claim 1 wherein said flush exit (14 f) is associated with and controlled with a flush exit valve (140).
 29. The apparatus of claim 28 wherein said flush exit valve (140) is internal to said housing (10) or external to said housing (10).
 30. The apparatus of claim 28 wherein said flush exit valve (140) is concertedly controlled with at least one of said fluid diverter (110) or said piston assembly (130).
 31. (canceled)
 32. The apparatus of claim 28 wherein said flush exit valve (140) may be controlled by at least one or more means selected from the group consisting of manually, electronically, remotely, and hydraulically.
 33. The apparatus of claim 2 wherein said piston assembly (130) and flush valve (140) are provided in the form of a pressure regulator adapted to actuate said flush opening (14 f) based on the pressure sensed across said plurality of disc filtering elements (20)
 34. The apparatus of claim 29 wherein said flush exit valve (140) is external to said housing (10) and is controlled by the fluid diverter controller (150).
 35. (canceled)
 36. The apparatus of claim 1 wherein said upstream flowing fluid in may be selected from: filtered flowing fluid, un-filtered flowing fluid, in-line filtered upstream flowing fluid. 